* {
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Chrome/Safari/Opera */
    -khtml-user-select: none; /* Konqueror */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    user-select: none;
}

html, body {
    margin: 0;
    height: 100%;
    box-sizing: border-box;
}

ul {
    margin: 0;
    padding-inline-start: 0px;
    list-style-type: none;
}

.top-menu {
    position: fixed;
    width: 100%;
    top: 0;
    height: 65px;
    z-index: 100;
}

/*
 * menu
 */
.top-menu .menu-title {
    position: absolute;
    left: 65px;
    height: 100%;
    width: auto;
    color: white;
    text-align: center;
    line-height: 65px;
    font-size: 28px;
    font-weight: 800;
    font-family: "楷体";
    cursor: pointer;
}

.top-menu .item {
    position: absolute;
    right: 65px;
    height: 100%;
    width: auto;
    line-height: 65px;
    white-space: nowrap;
}

.top-menu .item li {
    top: 0;
    margin-left: 10px;
    margin-right: 10px;
    display: inline-block;
}

.top-menu .item li a{
    font-size: 17px;
    font-weight: bold;
    font-family: "黑体";
    color: white;
    text-decoration: none;
}

.top-menu .item img{
    transform: translate(0, -3px);
    -ms-transform: translate(0,-3px);
    -webkit-transform: translate(0,-3px);
}

.item-state-white:hover{
    border-bottom: 2px solid white;
}

.item-state-black:hover {
    border-bottom: 2px solid black;
}

.top-menu .dropdown {
    display: none;
    position: absolute;
    top: 63px;
    transform: translate(-5px,0);
    -ms-transform: translate(-5px,0);
    -webkit-transform: translate(-5px,0);
}

.top-menu .dropdown-state-black {
    background: #2a2a2a;
}

.top-menu .dropdown-state-white {
    background: white;
    border-left: 2px groove #efefef;
    border-right: 2px groove #efefef;
    border-bottom: 2px groove #efefef;
}

.top-menu .item .dropdown li {
    display: block;
    text-align: center;
    margin: 0px;
    line-height: 40px;
}
